16066661605556 has 48 divisors (see below), whose sum is σ = 28745801344512. Its totient is φ = 7853947411200.

The previous prime is 16066661605487. The next prime is 16066661605597. The reversal of 16066661605556 is 65550616666061.

It is a happy number.

16066661605556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 16066661605495 and 16066661605504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1054166096 + ... + 1054181336.

It is an arithmetic number, because the mean of its divisors is an integer number (598870861344).

Almost surely, 2^{16066661605556} is an apocalyptic number.

It is an amenable number.

16066661605556 is a deficient number, since it is larger than the sum of its proper divisors (12679139738956).

16066661605556 is a wasteful number, since it uses less digits than its factorization.

16066661605556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20960 (or 20958 counting only the distinct ones).

The product of its (nonzero) digits is 34992000, while the sum is 59.

The spelling of 16066661605556 in words is "sixteen trillion, sixty-six billion, six hundred sixty-one million, six hundred five thousand, five hundred fifty-six".